Rocker arm question

[HOT_ROD_CAR]

Can I use the following rocker arms in a stock 1987 5.0?

Ford CNC Roller tip rocker arms 1.7 R 3/8"

SB Ford 260/289/302/351W CNC Roller Tipped Rockers - 1.7" Ratio 3/8" Studs Part # CNC-083023

 

[88mudder]

if you have a roller cam then yes

 

[1990 sc]

there the stamped roller end .. yes you can bolt them on full roller fulcrum rockers yes still bolt them on.. they will free up valve train bind .. ohh gee makes what h/p.. yes .. * smiles use them. you dont need a roller cam to use them

 

[Totalled]

Are they bolt on or stud mount?

 

[baddad457]

Can I use the following rocker arms in a stock 1987 5.0?

Ford CNC Roller tip rocker arms 1.7 R 3/8"

SB Ford 260/289/302/351W CNC Roller Tipped Rockers - 1.7" Ratio 3/8" Studs Part # CNC-083023

No can do. These are a 3/8" stud mount rocker. You need pedestal mounts on an 87 head. Unless you've had the heads drilled, tapped and machined for studs.

 

[gotmudd]

No can do. These are a 3/8" stud mount rocker. You need pedestal mounts on an 87 head. Unless you've had the heads drilled, tapped and machined for studs.

+1 and whether or not you have a roller cam is of no consequence. like baddad said the only way to use them is to drill and tap for studs.

 

[Totalled]

or buy the crane conversion kit for pedestal heads..

 

[HOT_ROD_CAR]

No can do. These are a 3/8" stud mount rocker. You need pedestal mounts on an 87 head. Unless you've had the heads drilled, tapped and machined for studs.

I am planning on drilling, tapping and installing 3/8" studs myself. I need to know if they will require relieved pistons for clearance, or will the stock pistons work? I want to experiment with this a little and see if it makes much of a difference. Thank you for the reply.

 

[HOT_ROD_CAR]

+1 and whether or not you have a roller cam is of no consequence. like baddad said the only way to use them is to drill and tap for studs.

Is it going to make much of a difference? Thank you.

 

[baddad457]

You're better off buying Crane's P/N 44746-16 Energizer 1.7 rockers. Bolt on swap. These are essentially the 93 Cobra's roller rockers, just sold straight out by Crane. As for the difference in performance, Ford found a 15 hp gain in the Cobra 5.0. This is from the increased lift at the valve (.030), the stabilized rocker ratios (they don't flex) and mostly from the reduced friction by replacing the sled fulcrums with the roller trunions. Oil temps are also reduced. Change the pushrods too, the roller pushrods don't spin and end up wearing funny on the rocker ends starting at about 100K miles. The pedestal mounts are plenty strong for what you're doing, no need for something stronger.

 

[HOT_ROD_CAR]

You're better off buying Crane's P/N 44746-16 Energizer 1.7 rockers. Bolt on swap. These are essentially the 93 Cobra's roller rockers, just sold straight out by Crane. As for the difference in performance, Ford found a 15 hp gain in the Cobra 5.0. This is from the increased lift at the valve (.030), the stabilized rocker ratios (they don't flex) and mostly from the reduced friction by replacing the sled fulcrums with the roller trunions. Oil temps are also reduced. Change the pushrods too, the roller pushrods don't spin and end up wearing funny on the rocker ends starting at about 100K miles. The pedestal mounts are plenty strong for what you're doing, no need for something stronger.

Excellent. This will save a lot of work. Thank you.